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Finding the Fourth Proportional to 101,745.90, 140,261.85 and 71,438.94

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Solution

The fourth proportional to 101,745.90, 140,261.85 and 71,438.94 is: 98,482.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,745.90 : 140,261.85 = 71,438.94 : x
  2. Step 2: Convert to fraction form
    101,745.90/140,261.85 = 71,438.94/x
  3. Step 3: Cross multiply
    101,745.90x = 140,261.85 × 71,438.94
  4. Step 4: Simplify right side
    101,745.90x = 10,020,157,886.44
  5. Step 5: Solve for x
    x = 10,020,157,886.44/101,745.90
  6. Step 6: Final answer
    x = 98,482.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.